Controller for a superconducting qubit
US12199603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2023 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Jul 14, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/195
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A superconducting controller for a superconducting qubit to execute high fidelity quantum gates using magnetic flux drive. The controller comprises: an inductance forming an inductive loop and configured to be inductively coupled to a qubit with a small mutual inductance; a pulse shaping circuit configured to apply a current pulse with a predefined shape across the inductance. The pulse shaping circuit comprises: a superconducting circuit configured to output single flux quanta (SFQ) pulses and a digital counter circuit configured to produce the shape of the current (magnetic flux) pulse by controlling the number of SFQ pulses applied to the inductive loop by incrementing or decrementing the current across the inductance by one SFQ pulse at a time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.